# Telman AlievInstitute of Control Systems, Azerbaijan National Academy of Sciences

Telman Aliev

Doctor of Technical Sciences, Professor

## About

219

Publications

2,921

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555

Citations

Citations since 2017

Introduction

Additional affiliations

September 1988 - present

Education

September 1977 - December 2016

**Electrical Engineer, Azerbaijan State Oil Academy**

Field of study

- Computer engineering

## Publications

Publications (219)

Existing control and management systems of oil field reservoir pressure maintenance equipment do not warn of the beginning of the latent period of accidents. At the same time, accidents are preceded by the emergence of certain defects, followed by their latent period, after which they develop. Only after that they begin to affect the readings of me...

The article is devoted to the development of algorithms for calculating the cross-correlation function and the correlation coefficient between the useful signal and the noise of a noisy signal. The authors analyze the factors influencing the adequacy of the results of solving the problems of monitoring, control, management, etc. It is noted that wh...

Vibration diagnostics is of particular importance in rail transport safety
systems because the signals received from vibration sensors installed on rolling stock,
bridges, tunnels, and other infrastructure objects have great diagnostic information
potential. Despite this, in practice, there are cases when the adequacy of the results of the
vibratio...

It is shown that when noisy signals are formed, the condition for the absence of correlation between the useful signal and the noise is often violated. This causes certain errors of correlation analysis of these signals, resulting in the inadequacy of the results obtained. In addition, the existing correlation analysis technologies do not allow usi...

It is shown that signals in control objects are usually various physical quantities such as temperature, pressure, vibration, etc. Therefore, when solving problems of control, diagnostics and identification, it becomes necessary to generate normalized correlation matrices. The difficulties of generating normalized correlation matrices of noisy inpu...

The paper covers creating the algorithms for calculating the probability of various types of defects in tunnels, the development of which can lead to accidents. Tunnels are an important and complex part of the transport and communication system, through which heavy traffic is carried out. Determining the probability of defects in the latent period...

The authors analyze the technical condition of objects of railroad communications with modern bridges, tunnels, stations, overpasses, crossings and power installations. It is noted that, based on the specific features of such objects, control of their technical condition in most cases is carried out at certain intervals. At the same time, existing...

It is shown that modern geometry cars, flaw detector cars and other track test cars provide reliable control of the technical condition of all hauls of the railroad track at “certain intervals of time”. Their number is limited and therefore “continuous monitoring” of all hauls is almost impossible. At the same time, in real life, due to the impact...

The paper deals with the development of algorithms for constructing the confidence interval for the mathematical expectation of the noise of a noisy signal. It is noted that the noise characteristics can be used as informative attributes of the beginning of the initiation of a defect in a technical object. It is also indicated that the problem of d...

The factors that have an effect on estimation errors of the correlation functions of noisy signals in using traditional algorithms to evaluate them are analyzed. It is shown that the sum noise of a noisy signal is caused by the influence of external factors and by noise which originates due to various imperfections in the operation of objects under...

In contrast to traditional systemsfor monitoring faultof the running gear of the rolling stock, thispaperproposesatechnology of noise control at the onset of defects. The authors consider the possibility of creating an intelligent system that can perform noise diagnosticswith the indication of the beginning of the latent period of the initiationof...

The paper deals with the development of algorithms for calculating the high-order moments of the noise of noisy signals and their use in the analysis of the technical condition of industrial facilities. It is shown that for monitoring and controlling the onset of an emergency at oil production facilities, random vibration signals are used, which, i...

The authors analyze the factors affecting the errors in the estimates of the correlation functions of the noisy signals when using traditional calculation algorithms. It is shown that the sum noise of the noisy signal in many cases consists of the noise caused by external factors and the noise caused by the initiation of various defects during the...

This book examines noise-monitoring technologies and tools for registering the threshold of development of the latent period of the transition of a facility or product into an emergency state and controlling the dynamics of this development. It also describes how the use of noise technology can improve the accuracy of the results of traditional met...

It is shown that the known systems of control and diagnostics of sucker rod pumping units of oil wells do not always succeed in early detection of the initiation of defects, at which negative consequences do not manifest themselves. This is due to the fact that in these systems, information about this is generated only at the beginning of a pronoun...

The specifics of the emergence of accidents at power plants and the difficulties of their prediction are analyzed. It is shown that traditional technologies of analyzing the signals obtained from the sensors of these stations do not allow one to extract diagnostic information contained in the noise. Therefore, control systems cannot register the be...

One of the possible solutions to the problem of monitoring the beginning of the initiation of anomalous seismic processes by carrying out of noise analysis of seismic-acoustic signals received from earth’s deep strata is considered. The diagram of the station for noise monitoring of the beginning of seismic processes is proposed in which bores of s...

The chapter analyses the difficulties that arise in the formation of correlation matrices for input and output signals in the latent period of an emergency state of industrial facilities, showing that due to significant errors in the estimates of their elements caused by the noise correlated with the useful signal, the use of traditional methods in...

The causes of additional errors in the estimates of the spectral characteristics of noisy signals due to the noise emerging in the latent period of facility’s emergency state are analyzed. Algorithms and technologies for replacing non-measurable samples of the noise with their approximate equivalent values are proposed, showing the possibility of u...

Causes of numerous accidents on fixed offshore platform s are analyzed. It is revealed that the noise of noisy signals received by sensors of control systems in many cases contain valuable diagnostic information related to the beginning of platform’s transition into the latent period of an emergency state. Taking into account this peculiarity, the...

The shortcomings of traditional technologies for correlation analysis of noisy signals at the beginning of the latent period of transition into an emergency condition are analyzed. It is shown that the noise correlated with the useful signal that appears during this period causes additional errors. At the same time, development dynamics of an accid...

Types and stages of initiation and development of defects caused by fatigue, corrosion, contamination, overheating, overload, scuffing, wear, etc., and preceding accidents of technical facilities are considered. It is shown that they manifest themselves in the form of noise in the signals received at the outputs of the sensors and introduce an addi...

The possibility of using laptops and smartphones to control the state of the heart by analyzing the noise of its sounds is considered. The results of heart control experiments using the proposed noise technologies are presented. The experiments were carried out by means of a Lithmann 3200 stethoscope connected to a laptop via Bluetooth. It is shown...

A position-binary technology for processing the signals of a load caused by the weight of a rod string on the suspension of a sucker-rod pumping unit is proposed. The method may be employed for identification of the technical state of deep-well sucker-rod units. An algorithm for identification of the technical state of the unit is developed. An imp...

Algorithms are proposed for determining estimates of the spectral characteristics of the noise of noisy signals, as are techniques for replacing with approximate equivalent values noise readings that are incapable of measurement. The possibility is indicated for applying the specified algorithms and techniques to increase the reliability of spectra...

A technology has been developed, which allows for calculating the probability density function of noise, its maximum and inflection points, using the discrete values of a signal corrupted by an additive random noise. Computational experiments have been conducted. It has been demonstrated that knowledge of those characteristics of noise allows syste...

We propose a technology for calculating the robust, normalized correlation functions of the signal from the force sensor on the rod string attached to the hanger of the sucker rod pumping unit. The robust normalized correlation functions are used to form sets of informative attribute combinations, each of which corresponds to a technical condition...

The algorithm is developed, which enables calculation of the high order statistic characteristic of interference by discrete values of a signal, distorted by additive random noise. Numerical experiments were performed. It is shown that it is possible to use these characteristics of noise in systems of monitoring, control, diagnostics, prediction, i...

It is shown that the registration of the beginning of the latent period of transition of most objects into an emergency state based on the results of traditional technologies is belated because of the impossibility to analyze the noise correlated with the useful signal, which in some cases leads to disastrous accidents. New technologies for the sys...

We analyze difficulties and propose algorithms for determining robust estimates of correlation functions for random noisy signals in monitoring and control systems. Robustness conditions are satisfied by eliminating the effect of interference on the error of the estimates obtained for a useful signal, correlated or uncorrelated with interference.

Over the last few years, the following theoretical and practical research, technologies and algorithms have been developed allowing one to determine characteristics of noise contained in noisy seismic-acoustic signals. These characteristics (noise variance, cross-correlation function between the useful signal and the noise, relay estimations, etc.)...

We demonstrate the possibility of monitoring changes in heart activity through the auscultation and analysis of heart sounds by means of a laptop or smartphone. The proposed technology allows laptop and smartphone users to create bases of reference for informative attributes in the most indicative periods of the day over the course of 10–15 days in...

We demonstrate that the distribution density function for the noise of a noisy random signal is the most comprehensive characteristic for identifying the initial period and the degree of fault growth. We develop algorithms and technologies to use this characteristic of the noise of the signal from the force transducer for preventing faults of sucke...

The authors have constructed the algorithms for building a noisy process probabilistic model consisting of probabilistic models of useful component and noise. A set of such characteristics of noise and a useful component as mathematical expectations, variance, mean-square deviations, distribution density functions and their maxima as well as inflec...

The authors analyse the causes of frequent failures of fixed oil platforms. It has been discovered that noise in the noisy signals received by the sensors of control systems in many cases contains valuable information about the beginning of a platform's transition into the latent period of an emergency state. Considering this specific characteristi...

We propose a technology for calculating robust correlation matrices and robust normalized correlation matrices to indicate the beginning of the latent period of the emergency state of technological objects. For the same purpose, we also propose a technology for calculating estimates of characteristics of noise and useful signal, which assumes zero...

We demonstrate that noises form in the beginning of the latent period of objects’ transition into an emergency state, causing continuous changes in the statistical characteristics of the technological parameters. The theoretical foundations of analysis of noise as a carrier of diagnostic information have been proposed, and the algorithms for formin...

We demonstrate that noises form in the beginning of the latent period of objects’ transition into an emergency state, causing continuous changes in the statistical characteristics of the technological parameters. The theoretical foundations of analysis of noise as a carrier of diagnostic information have been proposed, and the algorithms for formin...

A technology has been developed which allows one to separate the density function of normal distribution of the useful component from the density function of the process noise distribution. A technology for calculating the parameters of the normal distribution of the useful component has been proposed. Computational experiments have been conducted...

Statistical methods are widely used in solving problems of automatic management of industrial objects, as they enable us to determine the dynamic characteristics during normal operation of objects. The statistical correlation method for determining these dynamic characteristics is based on the solution of an integral equation that includes the corr...

To minimize damage from earthquakes, intelligent robust noise technology and a system that allows to combine the monitoring of the latent period of violation of seismic stability with the monitoring of origin of anomalous seismic processes (ASP) is proposed. The system includes a network of seismic-acoustic stations for monitoring the beginning of...

Technologies and algorithms for finding the analytic representation of the density function of normal distribution of noise have been developed. Technologies for calculating the distribution parameters for a noise with a zero mean have been developed. Computational experiments have been conducted. The importance and relevance of using the obtained...

To obtain the information about the vulnerability of seismic stability of construction objects, we propose technologies and systems for the analysis of noisy signals received during weak earthquakes (which are typically more frequent than strong ones) from sensors installed in the most informative spots of a structure. It has been demonstrated that...

We analyzed the difficulties of operating the system for monitoring of seismic stability and technical condition of building structures. Technologies are proposed for solving the problem of monitoring at early stages of violation of seismic stability with application of sets of informative attributes consisting of variance, correlation, static and...

Robust noise technology is presented for the analysis of seismic-acoustic signals, which allows the use of noise in the signal as a carrier of information at the start of anomalous seismic processes preceding earthquakes. A station has been built based on this technology, which receives seismic-acoustic noises from the deep strata of the earth by m...

Robust noise technologies for analyzing a seismic acoustic signal that allow using its noise as a carrier of information at the beginning of abnormal seismic processes preceding an earthquake are proposed. A station which receives seismic acoustic signals from the deep strata of the earth with the help of 3–6 km-deep steel bores of dormant oil well...

The technology of forming robust correlation matrices and robust normalized correlation matrices of the matrix equations of multidimensional stochastic objects, both in the presence of correlation between the useful signal and noise, as well as in its absence, is proposed. This results in the ability to provide adequate monitoring of the latent per...

The book offers noise technologies for monitoring of the beginning of cardiovascular and respiratory diseases, considering the possibility of listening to the sounds of heart and lungs by means of mobile phones. Such estimates of the sounds of heart and lungs as noise variance, value of noise correlation, cross-correlation function between the usef...

Technologies and systems are offered, in which seismic-acoustic information from deep strata of the earth is received by means of acoustic sensors (hydrophones) installed at heads of suspended oil wells. The information on the state of seismic stability of construction objects is sent from sensors to local systems. Robust noise analysis of both sei...

Analysis of seismic information received by means of acoustic sensors installed at the head of oil wells proved that when anomalous seismic processes (ASP) arise, seismic-acoustic waves spread in deep strata of the earth several tens of hours earlier than the expected earthquake is registered by ground seismic stations. Technology is offered for ro...

Robust noise technology for analysis of seismic acoustic signal is offered, which allows using the noise in the signal as a carrier of information in the beginning of anomalous seismic processes preceding earthquakes. A station has been built based on this technology, which receives seismic acoustic noises from the deep strata of the earth by means...

In control systems using conventional technologies of signal analysis, results of monitoring of change in seismic stability of offshore structures are determined when they have taken express form. The offered technologies will allow detecting those changes in their initial latent period. It will thereby be possible to organize timely preventive mea...

As a result of the exploration and experimental data three year period getting from the three side by side acting oil extraction wells and the using coefficient rang correlation of Spirmen are determined degree of interaction the well. Finally it is shown that estimate technological efficiency necessary carry out for all the section oil field as in...

The approaches to improve the effectiveness of oil field exploitation using mathematical models of the oil deposit processes for forecast oil well debit are realized. It has been shown that using formula Kolmogorov-Erofeev allowed to receive more adequate model. On the base system analysis of the oil deposit processes was carried out the selection...

A technology is offered for monitoring of condition of the cardiovascular system based on the analysis of ECG noise variance. ECG noise variance is shown to be a carrier of useful information on hidden pathological processes in the cardiovascular system. Use of mobile phones with application of the offered technology of analysis of cardiosignals wi...

Algorithms have been developed for determining of the instantaneous flow rate of oil wells operated by rod deep-well pumping units with the use of noise technologies for analysis of dynamometer and wattmeter cards. Least-squares method has been used to determine coefficients of RNMT model.

Abstract The book offers technologies and a system, in which seismic-acoustic information
from deep strata of the earth is received by means of acoustic sensors (hydrophones)
installed at heads of suspended oil wells. The information on the state of seismic stability of
construction objects is sent from sensors installed in vulnerable units of b...

The book offers technologies and a system, in which seismic-acoustic information from deep strata of the earth is received by means of acoustic sensors (hydrophones) installed at heads of suspended oil wells. The information on the state of seismic stability of construction objects is sent from sensors installed in vulnerable units of buildings to...

Technology for determining values of noise variance, cross-correlation functions and coefficients of correlation between the useful signal and the noise is proposed for monitoring of the latent period of an object failure. The determined values form sets of informative attributes, which are equal to zero in the normal state of the object. In the co...

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